remove useless examples/assets/fonts/style.css (#2199)
remove useless examples/assets/fonts/style.css (#2199)

联动 https://github.com/ElemeFE/element/issues/1703

没用到的字体，会引起编译错误，建议去除。
Kingwl/element,immissile/m-element,youngerheart/element,ElemeFE/element,immissile/m-element,renxia/element,Raganof/element,karol-f/element,youngerheart/element,Leopoldthecoder/element-1,karol-f/element,iamnewsea/element-pzx,Raganof/element,ElemeFE/element,Leopoldthecoder/element-1,baiyaaaaa/element,pengchongfu/element,iamnewsea/element-pzx,Kingwl/element,huguangju/element,reverland/element,JavascriptTips/element,jsyczhanghao/element,JavascriptTips/element,renxia/element,engriary/element,reverland/element,imyzf/element,pengchongfu/element,engriary/element,baiyaaaaa/element,imyzf/element,huguangju/element